长江三峡新滩滑坡的滑动机理和前景预测

XINTAN LANDSLIDE IN THE YANGTZE GORGES MECHANISM AND PREDICTION

本文叙述新滩滑坡的地形地质概况和勘探取样的土工试验成果及其稳定计算分析,阐明1985年滑坡的机理和滑坡目前的状态,对滑坡体顶缘继续受到岩崩堆积加载和坡脚清挖长江航道以及暴雨引起的地下水位变动对稳定性的影响进行计算预测.在影响滑坡体稳定的各种影响因素中,地下水位的变动相对来说是最重要的.

Described in this paper are the general topographic and geologic conditions for the Xintan landslide that occurred in 1985 in the Yangtze Gorges, the geotechnical test results obtained on the bore sample basis, and the stability calculations and analyses.The mechanism of the slide and its present state are expounded.Also, forecast is made concerning the stability of the slide since it is still affected by the constant rockfall on to its top fringe, the excavation of navigation channel along the foot of its slope, and the storm-caused ground water stage fluctuation.The last, the author deems, is the most important factor affecting the stability of the slide mass.